Discussion:
Transmission fault on a TCM FHG18T3

Hello,

I have a transmission fault on a TCM FHG18T3 where when you engage drive there is about a 3 second delay for drive to engage

I have checked the pressures on this transmission of which i am getting readings of

Charging pump 180psi at tick over and 220psi when the truck is revved up

torque converter 10-15 psi at tick over and 90 psi when revved up

and clutch pack pressure of 100psl once the truck engages drive ( and will drive )

I do not have a workshop manual for this transmission to know what pressures i should have,

So could any one tell me what they should be ?

but given the pressure on the torque converter is only 10-15psi on tick over i am now inclined to think that the fault (the delay on drive ) is due to a faulty converter, Whats your thoughts ?

Regards
John
  • Posted 11 Jul 2019 03:35
  • By JohnBon
  • joined 25 Mar'16 - 11 messages
  • Staffordshire, United Kingdom
Showing items 1 - 2 of 2 results.
Hello John,

I have Service Manual for TCM FHG 18T3 ( Book Version).

Please, send me your Mail.

Regards
  • Posted 15 Jul 2019 22:05
  • By stefano_tcm
  • joined 25 Oct'14 - 109 messages
  • ITALIA, Italy
TCM Forklift spare parts
tcmricambi@gmail.com
your readings on the torque converter pressures are within specs for a torque converter pressure range.

What i would be checking is the inching adjustments and making sure it is releasing completely, if inching circuit is not fully releasing it can cause a hesitation in the clutches engaging.
Other things to check would be the inching spool/linkage/cable for binding.
Otherwise there may be some issues with the flex rings or something else in the clutch packs. (this would be worse case scenario)
  • Posted 11 Jul 2019 15:26
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com

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